Desk.



F. G. KOLLENBERG.

DESK. APPLICATION FILED IEB.1,1913.

Patented Aug. 11, 1914,

2 SHEETS-SHEET l.

Attorneys THE NORRIS PETERS CO PHOTO-1.17710" WASHINGTON. D C

F. G. KOLLENBERG.

DESK.

APPLICATION FILED M34, 1913,

Patented Aug. 11, 19141 2 SHEETS-SHBET z.

Attorneys IHF NORRIS PETERS CO. FHOTO-LITHO.. WASHINGTON D I nniTnn STATES PATENT curios.

FREDERICK G. KOLLENBERG, OF OWEN SBORO, KENTUCKY, ASSIGNOR OF ONE-FOURTH T WILLIAM E. AUD AND ONE-FOUBTI'I TO BQY L. MCFARLANID, OF QWENSBORO,

KENTUCKY.

DESK.

Specification of Letters Patent.

Patented Aug. 11, 1914.

Application filed February 1, 1913. Serial No. 745,735.

To all whom it may concern:

Be it known that I,FREnnnIoK G.KOLLEN- BERG, a citizen of the United States, residing at Owensboro, in the county of Daviess and State of Kentucky, have invented a new and useful Desk, of which the following is a specification.

This invention relates to school seats and desks, its object being to provide a pedestal which serves to support both the desk and the seat, novel means being employed Whereby the desk and seat can be elevated readily and independently of each other so as to adjust them to the persons using them.

Another object is to provide improved means for locking the parts in their. adjusted positions, said means being readily shifted out of active positions when it is desired to lower the adjusted parts.

WVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown."

, of the slide actuating levers. Fig. 6 is a perspective view of one of the locking pawls and its actuating means. Fig. 7 is a detail view of the pedestal. Fig. 8 is a transverse sectionthrough the back portion of the desk and through the adjacent portion of the pedestal.

It is designed primarily to make all metal parts of this desk and'seat outof pressed steel, the partsbeing so'shaped' asto possess the maximum strength. Thelpedestal 11is formed of pressed steel and has an oval base 2 provided with" an outstanding annular flange 3 adapted to be secured in any suitable manner to the floor. The front portion of the pedestal is curved inwardly and upwardly, as indicated at 4 and the back portion of said pedestal describes an ogee curve,

as indicated at 5, it being apparent, therefore, that the upper end portion of the pedestal base is thus substantially frusto-conical. Mounted on the upper orfrusto-conical portion of the base 1 is a pedestal head 6 likewise formed of pressed steel and soldered or otherwise secured upon the base 1, 'although it may be found possible and desirable to make the head integral with the base. This head 6 is preferably substantially rectangular in cross sectional contour and extends laterally beyond the sides of the upper end portion of base 1, there being braces 7 connecting the sides of the bottom portion of the head to the sides of the base 1.

As shown in Fig. 1,the back wall of the head 6 is curved inwardly and upwardly, as M78 and terminates adjacent the center of the back ofthe head. The front and the top of the head are open and the bottom of the head is provided with apertures 9 and 10 for the purpose hereinafter set forth. Slots 11 are formed in the bottom of the head6 along the inner faces of the sides of the head,'these slots being located beyond the sides of the upper end portion of pedestal 1 andbeing provided, along their inner side edges,with upstanding guide wings 12. f

The front and rear edges of the sides of head 6 areprovided with inwardly directed guide flanges 13 and 14 respectively and mterposed between these flanges and soldered or otherwise secured to the inner surfaces" of the sides of the head 6, are channel strips 15; Thus two spaced channels 16 and 17 are formed upon the inner faces of the sides of head 6, these channels being located be tween the channel strips 15 and the respective'flanges 18 and 14. Those portions of the sides of head 6 constituting walls of the channels 16have parallel grooves 18 pressed outwardly thereinto. The front edge of the bottom of head 6 has an upwardly and rearwardly extending brace 19 thereon, said brace, being connected to or formed with a cross strip 20 at the upper end thereof, this v strip extending'into the channel strips 15 and being securedto them in any desired manner; Brace 19 may be provided with apertures 21 and 22, the aperture21 being disposedin vertical alinement with the aperture-10 hereinbefore referred to. The upper ends of the sidesof head 6 may be con- .it will be apparent that the side strips 24 Slidably mounted inthe channels 17 is frame made up of oppositely disposed channeled strips 24 connected adjacent'their upper andlower ends, by cross strips 25, the rear flanges of the channeled strips belng;

provided with longitudinally extending wings 26 which are folded outwardly so as to la'p'the said flanges of the side strips although spaced from them. These wings are adapted to be secured in any suitable manner to the back of the desk 27, said back, as well as the sides of the desk, being preferably formed of pressed steel. nels 28 formed between the strips 24 and the wings 26 are adapted to receive the flanges 14 on the pedestal head and the side strips 24 are adapted to slide freely between said flanges 14 and the channel strips 15. Ex; tending from those side strips 24 nearest the channel strips 15 are longitudinal flanges 29 which extend forwardly and partlylap the strips 15, these flanges 29 being pro- 'vided with ratchet teeth 80.

and the desk connected thereto, cannot move downwardly. However, by shifting the pawl out of engagement with the teeth, this downward movement of the desk is made possible.

Pivotally mo unted upon a bracket 34 on the bottom ofthe head 6 is a lever 35 having a long-arm and a short arm, thelong arm being extended" through an opening 36 in the pedestal base while the short arm'is pro-- vided with a weight 37 whereby the long arm is held normally elevated. The short arm of the lever is connected, by arod 38, "to the pawl 31 close to the active edgeof the pawl so that. as the short arm of the lever is normally held in'its lowermost position, the pawl 31 is likewise normally held in engagev ment with the teeth on the flanges 29. .This 55 will be apparent by. referring to- Figs. '1 and6. 7 A bar 39 is fixedly connected to onefof the cross strips and extends downwardly be-T tween andparallel with the sidejstri'ps 24." 'This bar has ratchet teeth 40 adapted'tobe;

engaged by a dog 41 pivotally connected to a lever 42. This leverris fulcrunied within the'h'ead '6 and extends through 'anopening 43 in said head. It will be apparent that,

bypressing downwardly on the-outer end of The chanlever 42, the dog 41 will be moved upwardly j 7 and, as this dog normally engag s h ratchet teeth 40, i1; 111 be apparenuhatvthe ,7

bar 39 will thus be 'moved' upwardlyand V i a 79 likewisemove upwardly. During this movecause the side strips 24 and the desk 271:0

ment the. teeth slip-past the .pawl;31.;

When, however, the lever 42 is released, pawl T 31 operates to secure'the desk in'its elevated v position until lever shall have been shifted so as to disengagethe pawl from the V teeth 30. l

The channels 16 are adapted to receive oppositely disposed channeled side strips 44, eachof which has anL-shaped wing 45 formed integral with the front flange thereof, the two wings 45 being connected by cross strips 46 which are secured to the wingsin any desired manner. The rear portions of the channeled strips 44 are provided with rear-wardly extending flanges 47 on which are arranged ratchet teeth '48.

The said channeled strips 44 have longitudinal grooves 50 pressed outwardly therein so as to form parallel ribs 51 upon the outer surfaces of the strips 44. These ribs 51 are adapted to slide within the grooves 18 and each ohanneled strip 44 is adaptedto fit snugly between the channel strip 15 and flange 13. The toothed flanges 47 extend backwardly so as to lap the'chan nel strips 15' and the L-shaped wings 45 exetend forwardly between the flanges 13 so that the cross strips 46 which are connected to these wings, may be attached in, any

suitable manner to the back 52 of the seat 54, upon goose neck arms 55 which are This seat is pivotally mounted, as at formed integral with and extend downwardly and forwardly from the channeled side strips 44. 'These: arms '55 are adapted to extend through the slots 11, the wings 12 extending up between the strips 44 so as to guide them and hold them in engagement with the sides of the head 6.

A pawl 56, similarto .thejpawl a1, is

pivotally mounted between the sides" of the head 6 and normally engages the toothed flanges 47-soas thus to hold the. strips 44 and the seat and back againstfdownward; movement. This pawl 56 is connected, by a rod 57 to a lever 58 similar to lever 35,this lever 58 having I its long arm extended through a slot 59 in the head of the pedestal a y V g 1110 V ously, by means of this lever 58,th'e pawl; 56 i and at one "side of i the opening .36. Obvican be shifted. out of engagement ith th g V teeth 48 and thejsidelstrips 44. and thepartsf connected thereto thuspermitted;topgravi-g V For the purpose of adjusting thefseat,np- I 'wardly, a bar 60is" attached to a crossstrip 2 filarranged between the upper end portions I of the side strips 44, this bar 6O being provided with ratchetteeth 61 adapted to be engaged by a dog 62 which, in turn, is carried by a lever 63 similar to lever 42. This lever 63 preferably extends through the opening 22 in brace 19 and is fulcrumed on said brace, the long arm of the lever projecting through a slot 64 in the wall of the pedestal head 6. Thus, by oscillating lever 63, the toothed bar 60 can be pushed upwardly, thus causing a corresponding movement of the seat and its back. By swinging lever 63 so as to disengage dog 62 from the teeth 61 and then shifting pawl 56 out of engagement with the teeth 48, the seat can obviously be caused to gravitate to a desired elevation.

What is claimed is 1. The combination with a base and a head, of a frame slidably mounted in the head and normally housed therein, said frame having similar toothed portions at the sides thereof, a single pivoted locking strip for simultaneously engaging corresponding teeth at each side of the frame to lock the frame against downward movement, a controlling lever connected to said means, a centrally disposed toothed bar secured to the frame, an elevating lever oper able from a point outside of the head, and a dog carried by the lever for engaging the bar to elevate the frame during the oscillation of the lever, all of said levers being grouped back of the upper portion of the base. 7

2. The combination with a base and an upstanding channeled head thereon, said head having an inturned flange along each side, of a frame mounted to slide within the head and including opposed channeled members, a longitudinally extending toothed flange upon each of said channeled members, cross strips fixedly connecting said channeled members and extending into the channels, outturned flanges upon the channeled members for straddling and slidably engaging the flanges on the head, a desk secured to said outturned flanges, a rack bar fixedly connected to and depending from one of the cross strips, a single pawl normally engaging corresponding teeth upon the toothed flanges on the channeled members, means for shifting the pawl into or out of engagement with said toothed flanges, and oscillatory means engaging the rack bar for elevating said bar and the desk carrying channeled members relative to the head.

3. The combination with a closed base having openings in the top thereof, of an upstanding head integral with the base and open at its top, front and back, said head having inwardly extended flanges along the sides thereof, a frame mounted to slide within the head and including opposed channeled members, said frame having a toothed portion, means engaging the toothed portion for holding the frame against downward movement relative to the head, a rack bar fixedly connected to the frame and extending downwardly therefrom, said rack bar being movable into the opening in the top of the base, and means for actuating the rack bar to elevate the frame relative to the head, and a desk secured to the frame and movable therewith.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

FREDERICK G. KOLLENBERG.

Witnesses:

F. A. RoBY, T. F. LEE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. G. 

